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I have a 2000 Pontiac Grand Am, with Supercharger. It

Customer Question

started knocking recently, and is...

I have a 2000 Pontiac Grand Am, with Supercharger. It started knocking recently, and is getting worse. Oil is good and changed regularly (Synthetic). I am afraid to drive it now. My first thought was the oil pump has gone out, but it only has less the 50K miles.

Thank you. Start by pulling off both engine drive belts and start the engine to see if it goes away. It is common for the supercharger to fail internally and cause this. If the noise is still there with the belts removed then it may be a rod knock or a collapsed lifter. You can tell which one it is by whether the noise seems to be from the top of the engine or the bottom.

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Customer reply replied 2 years ago

I was thinking it could be the Supercharger, but didn't know how to check. I will do as you advised. Thanks for the good advice. This was what I was looking to find out.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.